<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script crossorigin src="https://unpkg.com/react@16/umd/react.production.min.js"></script>
    <script crossorigin src="https://unpkg.com/react-dom@16/umd/react-dom.production.min.js"></script>
    <!-- 生产环境中不建议使用 jsx babel转译库 将jsx转化为原生js -->
    <script src="https://cdn.staticfile.org/babel-standalone/6.26.0/babel.min.js"></script>
</head>
<body>
    <div id="app"></div>



    <script type="text/babel">
        class App extends React.Component{
            constructor(props){
                super(props)
                this.state={
                    count:17,
                    name:'小明'
                }
            }
            render() {
                return(
                    <div>
                        <p>name:{this.state.name}</p>
                        <h3>{this.state.count}</h3>
                        <button onClick={()=>{
                            // this.setState({count:this.state.count + 1})
                            this.setState((state,props)=>({count:state.count + 1}))    
                        }}>add</button>
                        <button onClick={()=>{console.log(this.state)}}>show</button>
                    </div>
                )
            }
        }
        ReactDOM.render(<App/>,document.getElementById('app'));
    </script>
</body>
</html>